01988naa a2200265 a 450000100080000000500110000800800410001902400430006010000170010324501050012026000090022552012190023465000120145365000160146565000130148165300200149465300140151470000170152870000210154570000140156670000160158070000180159670000180161477300900163219794812021-11-10       2014    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1002/jctb.41592DOI1 aWNETRZAK, R.  aInfluence of pig manure biochar mineral content on Cr(III) sorption capacity.h[electronic resource]  c2014  aAbstract: BACKGROUND: The adsorption of Cr(III) ions on various pig manure biochar (BC) samples was investigated to determine the effect of operating conditions (initial pH, sorbate and sorbent concentrations) on sorptive capacity. The BC samples with higher sorption capacity showed high surface area and were rich in alkalinemetals whose concentration wasmeasured by ICP-OES. RESULTS: For BCs from anaerobically and chemically pretreated feedstock greaterpH changes and highermaximum capacity were noted during Cr(III) adsorption than for BC frommechanically pretreated samples, due to a higher ion exchange capacity. Themaximum Cr(III) uptake of 102 mg g-1 for the BC sample was achieved at c0 =300 mg dm-3 and pH=5. It was also observed that the high ash content effectively lowered the surface area of BCs; however all BCs investigated contained a low level of toxic metals. CONCLUSIONS: The data indicate that both the technology used for separation of the manure and pyrolysis temperature had a significant influence on the physical and chemical properties of the BC and affected its sorption capacity. In addition, compared with other sorbents pig manure BC has one of the best Cr(III) sorption capacities.  abiochar  aSeparação  aSorção  aDejetos suínos  aPirólise1 aLEAHY, J. J.1 aCHOJNACKA, K. W.1 aSAEID, A.1 aNOVOTNY, E.1 aJENSEN, L. S.1 aKWAPINSKI, W.  tJournal of Chemical Technology and Biotechnologygv. 89, n. 4, p. 569-578, Apr. 2014.